/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.administrator.nurse.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.os.Build;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.LinearLayout;
import android.widget.RadioButton;

import java.util.ArrayList;
import java.util.List;

public class MyRadioLayout extends LinearLayout {
    // holds the checked id; the selection is empty by default
    private int mCheckedId = -1;
    // tracks children radio buttons checked state
    private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
    // when true, mOnCheckedChangeListener discards events
    private boolean mProtectFromCheckedChange = false;
    private OnCheckedChangeListener mOnCheckedChangeListener;
    private PassThroughHierarchyChangeListener mPassThroughListener;

    /**
     * {@inheritDoc}
     */
    public MyRadioLayout(Context context) {
        super(context);
        setOrientation(VERTICAL);
        init();
    }

    /**
     * {@inheritDoc}
     */
    public MyRadioLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        mCheckedId=View.NO_ID;
        mChildOnCheckedChangeListener = new CheckedStateTracker();
        mPassThroughListener = new PassThroughHierarchyChangeListener();
        Log.d("nurse", "---init---");
        super.setOnHierarchyChangeListener(mPassThroughListener);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
        // the user listener is delegated to our pass-through listener
        mPassThroughListener.mOnHierarchyChangeListener = listener;
        Log.d("nurse", "---setOnHierarchyChangeListener---");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        Log.d("nurse", "---onFinishInflate---" );

        // checks the appropriate radio button as requested in the XML file
        if (mCheckedId != View.NO_ID) {
            mProtectFromCheckedChange = true;
            setCheckedStateForView(mCheckedId, true);
            mProtectFromCheckedChange = false;
            setCheckedId(mCheckedId);
        }
    }

    @Override
    public void addView(View child, int index, ViewGroup.LayoutParams params) {
//        Log.d("nurse", "---addView---" );
//        if (child instanceof RadioButton) {
//            final RadioButton button = (RadioButton) child;
//            if (button.isChecked()) {
//                mProtectFromCheckedChange = true;
//                if (mCheckedId != -1) {
//                    setCheckedStateForView(mCheckedId, false);
//                }
//                mProtectFromCheckedChange = false;
//                setCheckedId(button.getId());
//            }
//        }else if (child instanceof  ViewGroup){
//         final RadioButton button=findRadioButton((ViewGroup) child);
//            if (button.isChecked()){
//                mProtectFromCheckedChange=true;
//                if (mCheckedId!=-1){
//                    setCheckedStateForView(mCheckedId,false);
//                }
//                mProtectFromCheckedChange=false;
//                setCheckedId(button.getId());
//            }
//        }
        final List<CompoundButton> list=findCheckedView(child);
        for (CompoundButton view : list){
            if (view!=null){
                if (view.isChecked()){
                    mProtectFromCheckedChange=true;
                    if (mCheckedId!=-1){
                        setCheckedStateForView(mCheckedId,false);
                    }
                    mProtectFromCheckedChange=false;
                    setCheckedId(view.getId());
                }
            }
        }
        super.addView(child, index, params);
    }

    /**
     * 查找radiobutton控件
     * @param group
     * @return
     */
    public RadioButton findRadioButton(ViewGroup group){
        RadioButton button=null;
        int len=group.getChildCount();
        for (int i=0;i<len;i++) {
            Log.d("nurse", "---findRadioButton---" );
            if (group.getChildAt(i)instanceof  RadioButton){
                button= (RadioButton) group.getChildAt(i);
                if (button.isChecked()) {
                    mProtectFromCheckedChange = true;
                    if (mCheckedId != -1) {
                        setCheckedStateForView(mCheckedId, false);
                    }
                    mProtectFromCheckedChange = false;
                    setCheckedId(button.getId());
                }
            }else if (group.getChildAt(i)instanceof  ViewGroup){
                findRadioButton((ViewGroup) group.getChildAt(i));
            }
        }

        return button;
    }
    private List<CompoundButton> findCheckedView(View child){
        List<CompoundButton> allCompoundButtonList=null;
        if (child instanceof CompoundButton){
            allCompoundButtonList=new ArrayList<CompoundButton>();
            allCompoundButtonList.add((CompoundButton) child);
        }else if (child instanceof  ViewGroup){
            ViewGroup group= (ViewGroup) child;
            for (int i=0,j=group.getChildCount();i<j;i++){
                List<CompoundButton> allChildCompoundButtonList=findCheckedView(group.getChildAt(i));
                if (allChildCompoundButtonList!=null){
                    if (allCompoundButtonList==null){
                        allCompoundButtonList=new ArrayList<CompoundButton>();
                    }
                    allCompoundButtonList.addAll(allChildCompoundButtonList);
                }
            }
        }
        return allCompoundButtonList;
    }
    /**
     * <p>Sets the selection to the radio button whose identifier is passed in
     * parameter. Using -1 as the selection identifier clears the selection;
     * such an operation is equivalent to invoking {@link #clearCheck()}.</p>
     *
     * @param id the unique id of the radio button to select in this group
     *
     * @see #getCheckedRadioButtonId()
     * @see #clearCheck()
     */
    public void check(int id) {
        // don't even bother
        Log.d("nurse", "---check---" );
        if (id != -1 && (id == mCheckedId)) {
            return;
        }

        if (mCheckedId != -1) {
            setCheckedStateForView(mCheckedId, false);
        }

        if (id != -1) {
            setCheckedStateForView(id, true);
        }

        setCheckedId(id);
    }

    private void setCheckedId(int id) {
        Log.d("nurse", "---setCheckedId---" );
        mCheckedId = id;
        if (mOnCheckedChangeListener != null) {
            mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
        }
    }

    private void setCheckedStateForView(int viewId, boolean checked) {
        Log.d("nurse", "---setCheckedStateForView---" );
        View checkedView = findViewById(viewId);
        if (checkedView != null && checkedView instanceof RadioButton) {
            ((RadioButton) checkedView).setChecked(checked);
        }
    }

    /**
     * <p>Returns the identifier of the selected radio button in this group.
     * Upon empty selection, the returned value is -1.</p>
     *
     * @return the unique id of the selected radio button in this group
     *
     * @see #check(int)
     * @see #clearCheck()
     *
     * @attr ref android.R.styleable#RadioGroup_checkedButton
     */
    public int getCheckedRadioButtonId() {
        return mCheckedId;
    }

    /**
     * <p>Clears the selection. When the selection is cleared, no radio button
     * in this group is selected and {@link #getCheckedRadioButtonId()} returns
     * null.</p>
     *
     * @see #check(int)
     * @see #getCheckedRadioButtonId()
     */
    public void clearCheck() {
        check(-1);
    }

    /**
     * <p>Register a callback to be invoked when the checked radio button
     * changes in this group.</p>
     *
     * @param listener the callback to call on checked state change
     */
    public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
        mOnCheckedChangeListener = listener;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        return new LayoutParams(getContext(), attrs);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
        return p instanceof LayoutParams;
    }

    @Override
    protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
        return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    }

    @Override
    public CharSequence getAccessibilityClassName() {
        return MyRadioLayout.class.getName();
    }

    /**
     * <p>This set of layout parameters defaults the width and the height of
     * the children to {@link #WRAP_CONTENT} when they are not specified in the
     * XML file. Otherwise, this class ussed the value read from the XML file.</p>
     *
     * <p>See
     *
     * for a list of all child view attributes that this class supports.</p>
     *
     */
    public static class LayoutParams extends LinearLayout.LayoutParams {
        /**
         * {@inheritDoc}
         */
        public LayoutParams(Context c, AttributeSet attrs) {
            super(c, attrs);
        }

        /**
         * {@inheritDoc}
         */
        public LayoutParams(int w, int h) {
            super(w, h);
        }

        /**
         * {@inheritDoc}
         */
        public LayoutParams(int w, int h, float initWeight) {
            super(w, h, initWeight);
        }

        /**
         * {@inheritDoc}
         */
        public LayoutParams(ViewGroup.LayoutParams p) {
            super(p);
        }

        /**
         * {@inheritDoc}
         */
        public LayoutParams(MarginLayoutParams source) {
            super(source);
        }

        /**
         * <p>Fixes the child's width to
         * {@link ViewGroup.LayoutParams#WRAP_CONTENT} and the child's
         * height to  {@link ViewGroup.LayoutParams#WRAP_CONTENT}
         * when not specified in the XML file.</p>
         *
         * @param a the styled attributes set
         * @param widthAttr the width attribute to fetch
         * @param heightAttr the height attribute to fetch
         */
        @Override
        protected void setBaseAttributes(TypedArray a,
                                         int widthAttr, int heightAttr) {

            if (a.hasValue(widthAttr)) {
                width = a.getLayoutDimension(widthAttr, "layout_width");
            } else {
                width = WRAP_CONTENT;
            }

            if (a.hasValue(heightAttr)) {
                height = a.getLayoutDimension(heightAttr, "layout_height");
            } else {
                height = WRAP_CONTENT;
            }
        }
    }

    /**
     * <p>Interface definition for a callback to be invoked when the checked
     * radio button changed in this group.</p>
     */
    public interface OnCheckedChangeListener {
        /**
         * <p>Called when the checked radio button has changed. When the
         * selection is cleared, checkedId is -1.</p>
         *
         * @param group the group in which the checked radio button has changed
         * @param checkedId the unique identifier of the newly checked radio button
         */
        public void onCheckedChanged(MyRadioLayout group, int checkedId);
    }

    private class CheckedStateTracker implements CompoundButton.OnCheckedChangeListener {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            // prevents from infinite recursion
            Log.d("nurse", "---onCheckedChanged---" );
            if (mProtectFromCheckedChange) {
                return;
            }




            mProtectFromCheckedChange = true;
            if (mCheckedId != -1) {
                setCheckedStateForView(mCheckedId, false);
            }
            mProtectFromCheckedChange = false;

            int id = buttonView.getId();
            setCheckedId(id);
        }
    }

    /**
     * <p>A pass-through listener acts upon the events and dispatches them
     * to another listener. This allows the table layout to set its own internal
     * hierarchy change listener without preventing the user to setup his.</p>
     */
    private class PassThroughHierarchyChangeListener implements
            OnHierarchyChangeListener {
        private OnHierarchyChangeListener mOnHierarchyChangeListener;

        @Override
        public void onChildViewAdded(View parent, View child) {
            Log.d("nurse", "---onChildViewAdded---" );
            if (parent == MyRadioLayout.this ) {
                final List<CompoundButton> list=findCheckedView(child);
                for (CompoundButton view:list){
                    if (view!=null){
                        int id = child.getId();

                        // generates an id if it's missing
                        if (id == View.NO_ID&&
                                Build.VERSION.SDK_INT>=Build.VERSION_CODES.JELLY_BEAN_MR1) {
                            id =child.hashCode();
                            child.setId(id);
                        }
                         view.setOnCheckedChangeListener(mChildOnCheckedChangeListener);
                    }
                }


            }
//            else if (parent==MyRadioLayout.this&&child instanceof ViewGroup){
//                RadioButton btn=findRadioButton((ViewGroup) child);
//                int id=btn.getId();
//                if (id==View.NO_ID){
//                    id=btn.hashCode();
//                    btn.setId(id);
//                }
//                btn.setOnCheckedChangeListener(mChildOnCheckedChangeListener);
//            }

            if (mOnHierarchyChangeListener != null) {
                mOnHierarchyChangeListener.onChildViewAdded(parent, child);
            }
        }

        @Override
        public void onChildViewRemoved(View parent, View child) {
            Log.d("nurse", "---onChildViewRemoved---" );
            if (parent == MyRadioLayout.this) {
                final List<CompoundButton> list=findCheckedView(child);
                for (CompoundButton view : list){
                    if (view!=null){
                        view.setOnCheckedChangeListener(null);
                    }
                }


            }
//            else if (parent==MyRadioLayout.this&&child instanceof ViewGroup){
//                findRadioButton((ViewGroup) child).setOnCheckedChangeListener(null);
//            }

            if (mOnHierarchyChangeListener != null) {
                mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
            }
        }
    }
}
